/Engine/Plugins/2D/Paper2D/Source/Paper2D/Classes/PaperTileMapComponent.h
Returns the polygon for the specified tile (will be 4 or 6 vertices as a rectangle, diamond, or hexagon)
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintPure, Category="Sprite") void GetTilePolygon ( int32 TileX, int32 TileY, [TArray](API\Runtime\Core\Containers\TArray)< FVector > & Points, int32 LayerIndex, bool bWorldSpace ) const